Agent Framework AG-UI (.NET)

Expose any AIAgent over the AG-UI protocol and consume it from a remote client over server-sent events. AG-UI standardizes the wire format for messages → tool calls → text deltas → state updates → errors so frontends, mobile apps, and CLI clients can interop with any compliant agent server.

This SDK ships two pieces:

• Microsoft.Agents.AI.Hosting.AGUI.AspNetCore — app.MapAGUI(endpoint, agent) extension that turns an AIAgent into an AG-UI server endpoint backed by SSE.
• Microsoft.Agents.AI.AGUI — AGUIChatClient that connects to an AG-UI endpoint and surfaces the stream as AgentResponseUpdates through the normal AIAgent API.

Architecture